/3tier-app

OtherNOASSERTION

Development of new n-tier app

Overview

New app for teaching Advanced Ansible replacing earlier bad-ansible.

Overall architecture is:

          flask1
lb ->               postgres
          flask2

Concept change from bad-ansible

n-tier app is designed to be well written but monolithic in its construction to all useful exercises in refactoring, introducing modularity, and a backdrop to create roles and or collections from sound a sound ansible code base.

Outline of main flow

  • common

    • setup yum repos (via satellite)

    • setup firewalld

  • setup postgres

    • firewalld rule opening 5432

    • install postgres 10

    • no data load phase - come back to that?

  • setup app tier

    • firewalld rule opening 443

Development Environment

While intended to be deployed on a real cloud or virtualization platform it comes with a Vagrantfile and associated playbooks

Deploying the Database Tier

Notes:

Does firewalld need to be configured?

Resources

  • Jeff Geerling’s Ansible Galaxy Role

  • Useful articles on Postgres

    • Setting it up from scratch

Credits

  • Aditya Patawari and Vikas Aggarwal

    • I used their phone app during debugging

    • Shout out for their Ansible Automation Cookbook

  • Jeff Geerlinguy for his Ansible Galaxy Postgres Role